The site boundary is based upon a seaward extension of 1 km around Rapa to encompass the foraging range of IBA threshold numbers of Red-tailed Tropicbird based upon a 1990 population estimate of 250 - 999 breeding pairs from Thibault, JC. and Varney, A. (1991) Breeding seabirds of Rapa (Polynesia): numbers and changes during the 20th century. Bulletin of the British Ornithologists Club, 111(2): 70-77.
Key biodiversity
The site boundary is based upon a seaward extension of 1 km around Rapa to encompass the foraging range of IBA threshold numbers of Red-tailed Tropicbird based upon a 1990 population estimate of 250 - 999 breeding pairs from Thibault, JC. and Varney, A. (1991) Breeding seabirds of Rapa (Polynesia): numbers and changes during the 20th century. Bulletin of the British Ornithologists Club, 111(2): 70-77.
